Geographic Variation in Medicare Spending. Yvonne Jonk, PhD

Transcription

1 in Medicare Spending Yvonne Jonk, PhD

2 Why are we concerned about geographic variation in Medicare spending? Does increased spending imply better health outcomes? How do we justify variation in Medicare expenditures if we don t see better outcomes associated with higher costs? 2

3 Overview Goal: Review how Medicare adjusts reimbursement levels by geographic region, teaching affiliations, etc. and describe the importance of readjusting cost estimates so that high costs represent differences in intensity of services versus differences in Medicare reimbursement levels and/or health status. 3

4 Medicare Price Adjustments Medicare reimburses health care providers for hospital admissions based on diagnostic-related groups (DRGs). CMS assigns a given DRG weight based on the estimated amount of resources necessary to provide a service. For example, in 2007:» Stent for major cardiovascular event: weight = 2.7» Bypass surgery: weight = 6.1» National average reimbursement rate = $5,301/DRG weight Actual payments per DRG vary considerably across Health Referral Regions (HRRs) (Dartmouth Atlas) 4

5 Medicare Price Adjustments In addition to base DRG rates, Medicare adjusts reimbursement rates for each procedure, treatment or physician visit for the following (regional) differences: Cost of living (NY vs ND) adjusted by wage index Higher payments to hospitals with medical and surgical residency training programs Disproportionate share hospital (DSH) payments designed to compensate hospitals that serve a high percentage of lowincome patients Thus, health services performed in urban areas typically have higher reimbursement rates than in rural areas 5

6 Medicare Price Adjustments When comparing costs of doing business across regions, want a standardized price. Don t want high prices to simply reflect differences in reimbursement rates Want to identify high spending areas that are typically characterized by overutilization of services for example If you don t acknowledge differences in reimbursement rates and back them out of the equation, high cost hospitals would be attributed in part to the fact that they are urban teaching hospitals or DSH (e.g. NYC) 6

7 Medicare Price Adjustments How? Dartmouth Institute: Standardized (normalized) prices so that everything rolls up to what Medicare spent on health services in any given year Inpatient care: standardized (normalized) DRG prices by setting the total price-adjusted dollar reimbursements in the U.S. in each year equal to total unadjusted, i.e. actual reimbursements. Σ (DRG weights * DRG price) * CMS price adjustments = $ actual Medicare inpatient care normalizing factor = $ actual IP/ Σ (DRG weights * DRG price) 7

8 Medicare Price Adjustments Outpatient (physician services): age, sex, and raceadjusted RVUs were added up across patients and HRRs, and then priced uniformly using a single national relative value unit (RVU) for every HRR in the county. Σ i (RVU i * GPCI i * Fee Schedule s Conversion Factor) = $ Medicare outpatient physician services i=1,2,3; 1=work RVU, 2=practice expense RVU, and 3=professional liability insurance expense RVU; GPCI = Geographic Practice Cost Indexes Note other policy adjustments for provider type, health professional shortage areas, service type 8

9 Importance of risk adjustment (Reschovsky et al, 2013; Newhouse & Garber, 2013): Analysts have attributed a substantial part of variation to health status, i.e. casemix Medicare beneficiaries who move from lower to higher spending regions have more diagnoses coded after their move, whereas those moving in the opposite direction do not Suggests some of variation explained by diagnoses on claims forms results from differing coding practices which may result from differences in the aggressiveness of diagnostic testing aggressiveness of care may be a cause of apparent variation in health status, rather than an effect! 9

10 Institute of Medicine (IOM) Create a value index? At request of members of Congress, IOM convened a committee to determine whether Medicare should modify payments to adjust for the value (quality) of services delivered in a region by using a value index Account for health benefits and costs Raise payment rates in areas where benefits are high relative to Medicare spending Lower payments where benefits are low relative to spending Idea funnel Medicare $$ to areas that provide high quality services at relatively low cost 10

11 Institute of Medicine (IOM) Create a value index? Controversial panel concluded a value index would be unfair because it would: Reward inefficient providers in low cost regions Increasing reimbursement for all providers in low-cost areas would unfairly reward poorly performing providers Punish more efficient providers in high-cost regions Reducing reimbursement for high cost regions would penalize high-performing 11

12 Institute of Medicine (IOM), ) Substantial part of variation across HRRs due to post-acute care: home health, skilled nursing facilities, rehabilitation, long-term care, and hospice 2) Magnitude of spending on post-acute care is suggestive of fraud weakening case for developing a value index 3) Lots of variation in admissions and visits among Hospital Service Areas (HSAs), which are subunits of HRRs 12

13 Institute of Medicine (IOM), ) Spending for one condition within an HRR was not strongly correlated with spending for another physician specialities within an HRR - not equally aggressive lots of intra-hrr variation among providers Target clinical decision-making units rather than geographic areas Value-based purchasing and accountable care organizations are step in right direction 5) Small correlations between spending on certain medical conditions and outcomes some positive, some negative Directional effect of changes in reimbursement levels on patient outcomes for patients with different conditions is uncertain 13

14 Commentaries NY Times nt-shift-payments-by-medicare-panelsays.html?src=recg&pagewanted=print 14

15 References Fisher ES, Wennberg DE, Stukel TA, Gottlieb DJ, Lucas FL, Pinder EL. The implications of regional variations in Medicare spending. Part 1: the content, quality, and accessibility of care. Ann Intern Med. Feb ;138(4): Fisher ES, Wennberg DE, Stukel TA, Gottlieb DJ, Lucas FL, Pinder EL. The implications of regional variations in Medicare spending. Part 2: health outcomes and satisfaction with care. Ann Intern Med. Feb ;138(4): Newhouse JP, Garber AM. Geographic variation in Medicare services. N Engl J Med. Apr ;368(16): Reschovsky JD, Hadley J, Romano PS. Geographic Variation in Fee-for- Service Medicare Beneficiaries' Medical Costs Is Largely Explained by Disease Burden. Med Care Res Rev. May Zuckerman S, Waidmann T, Berenson R, Hadley J. Clarifying sources of geographic differences in Medicare spending. N Engl J Med. Jul ;363(1):

16 References Medpac Basics for each type of Medicare payment systems - Appendix on the Geography of Health Care in the United States from the Dartmouth Atlas of Health Care. Available at: geogappdx.pdf 16